URAL Bulava 10 (2+2)
10″ subwoofer · dual 2 Ω · 800 W RMS
Fs 33.2 HzQts 0.33Vas 0.68 ft³Xmax 0.94″
Recommended box
For a sedan, one sub, 800 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.
Sealed
| Net volume | 0.46 ft³ (13 L) |
|---|---|
| Qtc | 0.52 |
| Fc | 52 Hz |
| F3 (−3 dB, no cabin gain) | 79 Hz |
| Example box (outside) | 12 5/8″ × 12 5/8″ × 8 5/8″ |
Ported
| Net volume | 0.99 ft³ (28 L) |
|---|---|
| Tuning (Fb) | 31 Hz |
| Port | round port Ø2 1/2″, 12 3/16″ long |
| Port velocity at 800 W | 305 ft/s |
| F3 (−3 dB, no cabin gain) | 30 Hz |
| Example box (outside) | 22 5/16″ × 15 3/4″ × 7 7/8″ |
Thiele/Small parameters
| Fs | 33.2 Hz |
|---|---|
| Qts | 0.33 |
| Qes | 0.36 |
| Qms | 4.06 |
| Vas | 0.68 ft³ |
| Re (one coil) | ≈ 1.7 Ω |
| Sd | 50.9 in² |
| Xmax | 0.94″ |
| Vd | 48.1 in³ calc. |
| Mms | 182 g calc. |
| BL | 13.4 T·m calc. |
| EBP | 92 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 84.9 dB calc. |
General
| Size | 10″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 800 W |
Mounting dimensions
| Cutout diameter | 9 5/16″ |
|---|---|
| Mounting depth | 5 5/16″ |
| Overall diameter | 10 11/16″ |
| Magnet diameter | 6 11/16″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 50.9 in².
“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.
Data sources
Other URAL 10″ models
- URAL AK-10 10″ · 4 Ω
- URAL AS-D10.3D2 (2+2) 10″ · dual 2 Ω
- URAL AS-D10.3D4 (4+4) 10″ · dual 4 Ω
- URAL AS-D10.3TD2 (2+2) 10″ · dual 2 Ω
- URAL AS-D10.3TD4 (4+4) 10″ · dual 4 Ω
- URAL Molot 10 (2+2) 10″ · dual 2 Ω
- URAL Patriot 10 (4+4) 10″ · dual 2 Ω
- URAL Symphony 10 (2+2) 10″ · dual 2 Ω